GPT-6.1 Terra vs SWE-2
GPT-6.1 Terra and SWE-2 are closely matched at 47.6 and 47.9 on the LLM Stats Score.
OpenAI · Cognition · Updated for 2026
Which is better?
GPT-6.1 Terra and SWE-2 are closely matched on the overall LLM Stats Score at 47.6 and 47.9.
In the 1 individual benchmarks reported for both models, GPT-6.1 Terra wins 1; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-6.1 Terra
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- you want the most recent training data — it shipped Oct 2026
Choose SWE-2
- you are already invested in the Cognition ecosystem
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for GPT-6.1 Terra · 4 for SWE-2
GPT-6.1 Terra outperforms in 1 benchmarks (Terminal-Bench 4.0), while SWE-2 is better at 0 benchmarks.
GPT-6.1 Terra significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only GPT-6.1 Terra specifies input context (1,050,000 tokens). Only GPT-6.1 Terra specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-6.1 Terra supports multimodal inputs, whereas SWE-2 does not.
GPT-6.1 Terra can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-6.1 Terra
SWE-2
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-6.1 Terra was released on 2026-10-26, while SWE-2 was released on 2026-09-10.
GPT-6.1 Terra is 2 months newer than SWE-2.
Oct 26, 2026
1 weeks ago
1mo newerSep 10, 2026
1 months ago
Knowledge Cutoff
When training data ends
GPT-6.1 Terra has a documented knowledge cutoff of 2026-06-01, while SWE-2's cutoff date is not specified.
We can confirm GPT-6.1 Terra's training data extends to 2026-06-01, but cannot make a direct comparison without SWE-2's cutoff date.
Jun 2026
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6.1 Terra and SWE-2 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6.1 Terra vs SWE-2.